Vulnerability Details : CVE-2021-33620

Squid before 4.15 and 5.x before 5.0.6 allows remote servers to cause a denial of service (affecting availability to all clients) via an HTTP response. The issue trigger is a header that can be expected to exist in HTTP traffic without any malicious intent by the server.
Published 2021-05-28 12:15:08
Updated 2023-10-24 14:52:14
Source MITRE
View at NVD,   CVE.org
Vulnerability category: Input validationDenial of service

Products affected by CVE-2021-33620

Threat overview for CVE-2021-33620

Top countries where our scanners detected CVE-2021-33620
Top open port discovered on systems with this issue 3128
IPs affected by CVE-2021-33620 2,224,232
Threat actors abusing to this issue? Yes
Find out if you* are affected by CVE-2021-33620!
*Directly or indirectly through your vendors, service providers and 3rd parties. Powered by attack surface intelligence from SecurityScorecard.

Exploit prediction scoring system (EPSS) score for CVE-2021-33620

EPSS FAQ
6.07%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 90 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-33620

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
4.0
 MEDIUM AV:N/AC:L/Au:S/C:N/I:N/A:P
8.0
2.9
 NIST
6.5
 MEDIUM CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
2.8
3.6
 MITRE
6.5
 MEDIUM CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
2.8
3.6
 NIST

CWE ids for CVE-2021-33620

  • The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.
    Assigned by: nvd@nist.gov (Primary)

References for CVE-2021-33620

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